A298925 Number of n X n 0..1 arrays with every element equal to 2, 3, 5, 7 or 8 king-move adjacent elements, with upper left element zero.

0, 1, 1, 11, 94, 955, 15163, 491338, 19329083, 1185260593

Offset

1,4

Comments

Diagonal of A298930.

Links

Table of n, a(n) for n=1..10.

Example

Some solutions for n=5
..0..0..1..0..0. .0..0..1..0..0. .0..0..1..0..0. .0..0..1..0..0
..0..1..0..1..0. .0..1..0..1..0. .1..0..1..1..0. .0..1..1..0..1
..1..1..0..1..0. .0..1..1..1..0. .1..1..0..0..1. .1..0..0..1..1
..0..1..0..1..0. .0..1..0..0..1. .0..1..1..1..0. .1..0..1..1..0
..0..0..1..0..0. .0..0..1..1..1. .0..0..0..0..0. .1..1..0..0..0

Crossrefs

Cf. A298930.

Sequence in context: A016150 A115203 A164547 * A016203 A241606 A326349

Adjacent sequences: A298922 A298923 A298924 * A298926 A298927 A298928

Keyword

nonn

Author

R. H. Hardin, Jan 29 2018

Status

approved